package com.sky.service.impl;

import ch.qos.logback.core.joran.util.beans.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorsMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/**
 * ClassName: DishServicelmpl
 * Package: com.sky.service.impl
 * Description:
 *
 * @Author 朱志辉
 * @Create 2024/5/17 下午6:16
 * @Version 1.0
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorsMapper dishFlavorsMapper;
    @Autowired
    public SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        //复制dishDTO的属性到dish
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId = dish.getId();


        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //遍历获取主键值
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorsMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除菜品
     *
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除----是否存在起售中的菜品？？
        for (Long id : ids) {
            //查询当前菜品是否起售中
            Dish dish = dishMapper.getById(id);
            if (Objects.equals(dish.getStatus(), StatusConstant.ENABLE)) {
                //当前菜品处于起售中的状态，不能删除
                //抛异常
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否能够删除----当前菜品是否被套餐关联了？？
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIdsByDishIds.size() > 0 && !setmealIdsByDishIds.isEmpty()) {
            //当前菜品被套餐关联了，不能删除
            //抛异常
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的菜品数据
       /* for (Long id : ids) {
            dishMapper.deleteById(id);
           //删除菜品关联的口味数据
            dishFlavorsMapper.deleteByDishId(id);
        }*/

        //根据菜品id集合批量删除菜品表中的菜品数据
        //sql：delete from dish where id in (?,?,?);
        dishMapper.deleteByIds(ids);

        //根据菜品id集合批量删除菜品关联的口味数据
        //sql：delete from dish_flavors where dish_id in (?,?,?);
        dishFlavorsMapper.deleteByDishIds(ids);


    }

    /**
     * 根据id查询菜品
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish byId = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorsMapper.getByDishId(id);

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(byId, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 根据id修改菜品基本信息和对应的口味信息
     *
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品基本信息
        dishMapper.updateById(dish);

        //修改菜品口味信息
        //先删除当前菜品对应的口味信息
        dishFlavorsMapper.deleteByDishId(dishDTO.getId());

        //再添加当前菜品对应的口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //遍历获取主键值
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorsMapper.insertBatch(flavors);
        }

    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     *
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d, dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorsMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    /**
     * 菜品的起售停售
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status, id);
    }
}
